Apparatus for lifting or propelling aircraft



Dec. 12, 1939. E. DALL'ASTA v APPARATUS FOR LIFTINQ 0R PROPELLING AIRCRAFT Filed Dec. 13, 1937 Fig.2

- 3nnen tor .E. .Ud/ /lsfa v Gttomeg Patented Dec. 12,

PATENT o1=1=1c11 APPARATUS FOR LIFTING OR PROPELLING AIRCRAFT Ernesto DallAsta, Lima, Peru Application December 13, 1937, Serial No. 179,596

1 Claim. (01. 170-141) The present invention refers to anapparatus,

to be used in aerial navigation, actingboth as an'elevator and propeller.

The apparatus consists of a mill with blades,

which are curved in a spiral shape. The assembly of the mill operates partly within anespecial cover, supported on thesame axis upon which the mill itself rotates. The position of the cover y can be altered and set to different sectors as may i be required.

The attached drawing describes and illustrates the invention.

Fig. 1 is a side view of the elevating and propelling apparatus.

Fig. 2 is the apparatus viewed from the front. I Fig. 3 is a section of same on line 33 of Fig. 1. v

Fig. 4 is a section on line 4'4 of Fig. 2.

I The apparatus comprises a central organ provide'd with blades, and thiscentral organ shall hereinafter be termed the rotor, and a second organ which partly covers the first organ, acting as regulator and director "of the action which the rotor performs.

The rotor assembly is formed by an organ, having two or more blades I, each of them being of exactly the same dimensions and shape. Blades I, start from the central axis 3, and extend towards the periphery, they are spirally curved, and'symmetrically placed around their axis. The bend of the blades is directed to- Wards, and follows, the direction of rotation. Blades 1 have flanges 2, along their side edges, but the edge of each of their peripheries is plain.

The cover 4 partly encloses the space delimited by the rotor blades in their revolving motion, and it has a curved surface'on the periphery,

v and plainsurface sides. The side walls of the ower have sigmoid-shaped edges at the opening, projecting" at one end 5, out from the periphery, in order to direct the air which is impelledby the rotor during its performance. 3

The axis extensions of the rotor serve both as supporting points and axis for the cover. The cover can be turned by a gear construction 6, occupying, thus, different positions as may be required in each particular case.

The apparatus as described above, is intended to act as an elevator and propeller in aerial navi- ,.gation.' Two apparatuses of this kind should be used simultaneously, these being placed one on each side of the airship and upon the same axis. 5 This arrangement is connected to a power engine for operating the device.

In theirrotating action, the blades, with their inner spiral curvature, force rearwardly the air which has been admitted through the front and 10 sides and has come in their path. The natural resistance which the air opposes to this action shall create the propelling and elevating force which is sought, and can be conveniently regulated and directed by the cover in its different 15 positions to which it can'be set during the time of the action.

The air which enters the cover through the open sector of the cover comes under the blades,

first, under the action of the vacuum created'by 20 I the passing of the preceding-blade, and second, by the displacing movement of the vehicle.

The air which iscompressedby the action of a blade, escapesby the time the blade reaches the end of the open periphery at5. This is caused 25 by its necessity for natural expansion as well as by the force of .inertia, and also by the action of the vacuum behind the vehicle in motion.

Due to the spiral curve of the blades, these develop an action which manifests itself upon 30 the element on which they act, in a perpendicular direction to a plane through the central axis. The resistance which the air opposes is in a perpendicular direction as shown by the small arrows in Fig. 4 35 Having described my invention, what I claim is:

An apparatus for elevatingand propelling airships comprising a shaft disposed transversely of the longitudinal axis of an airship adapted to be rotated by the power plant, a plurality of 4 blades fixed to said shaft, the surface of each blade extending parallel to said shaft and curving spirally from the end attached to said shaft to the free end, a cover partly enclosing said blades, said cover being semi-circular in shape, 45 having plain lateral walls and projecting sigmoidshaped edges about the opening.

ERNESTO DALLASTA. 

